please help:(

ive been with this boy for 5 months. we’ve had a rough relationship with other people getting in the way and stuff. whenever he gets upset he always tells me how he feels insecure and doesnt like how he looks. and whenever we argue and says that aswell, its as if hes forcing me in the relationship, and hes stopping me from breaking up with him. recently ive been feeling like im not happy in the relationship anymore. and that i dont want to see him anymore. but what do i say because i dont want to upset him or hurt him? its hard cos we only see each other twice a week, please someone tell me what to do or how to break up with him in a nice way, thank you in advance xx